Bilge water ejector for outboard motorboats



July 29, 1952 J. FRYE BILGE WATER E'JECTOR FOR OUTBOARD MOTORBOATS Filed June 23, 1948 INVENTOR. Jack Frye BY %M.o 4%

xi77' A/E) Patented July 29, 1952 f ,BiiQGETWATEiiIEiECTOBron our soenp i J MOT B Q h Jack Frye, SedonmAriz. V

' v Application June 23, 194s,'=seria1No..s4,i5e i V too sturdy construction, frequently result in a continuous accumulation of bilge water which has to be removed. On the other hand,'the lack of' an engine and accessory mechanism within the boatand the arrangement'of'the motor out- 1. side the boat proper and its connectionto the boat' b'y 'way of adjustable connections; preclude such simple utilization of -the engine or accessory partsthereof for purposes of removing the-bilge water',-'as have been suggested in the prior art. Separate pumping mechanism for transporting and "discharging the bilge water is'unde'sirable in the case of outboard motor driven boats-where space'must not be wasted-and Weight must not lee-increased. v

' Accordingly, it is one of the primary objectives oi the invention to provide adevice for removing the bilge water from outboard motor driven boats, which does not require additional, separate apparatus for conveying and discharging the bilge water but utilizes existing mechanism without interference with the established functions thereof.

It is another major object of the invention to provide a simple accessory device whereby the cooling system of t-he'outboard motor assumes the additional function of transportingand discharging the bilge water from the boat.

A further object of the invention is to provied simple and inexpensive means whereby the outboard motor is enabled, either continuously or intermittently as may be desired, to remove the bilge water from the boat without there being any interference with the established characteristics and functions of the motor, including the adjustable connection to the boat.

Other objects, and the manner in which the same are obtained, will appear as this specification proceeds.

In the drawing, which illustrates the invention diagrammatically by way of example,

Fig. 1 shows, partly in cross-section, the stern ne (01. 115- f "of a'boatmth an mnboard maul attached the.

{Fig. zshows, in crds's-s'ectionQatdetail of Fig. 1,

andlzig' "Fig. 3' s'howsfpartly'in crossse'ctiomthelower unit of a' different type of outboard motor.

Referring now to the drawing and first to Figs. 1 and 2, the outboard motor, generally indicated 'at In, is shown connected, by way of-a' conventional clamp structure H, to fthe boat' bodyindicated at I 2. Within the boatbody l2'ithere 'isthe usdal fiooror decking 13 which is spaced "from the bottom of the boat, and it is "in "the vicinity :of "this fioorl3 that the bilge water. indicatedat'l l, accumulates? a The'outb'oard motor shcwninFig; 1 includes a cooling-"system comprisingapertures 15 located in front of the propeller'yaspipe system' It. connectedto thei-apertures ili*and'leading to the cooling jacket 'oi' 'the motor-:(not-shown), there being an outlet from theccoling' ij'acket, indicated at l1. This cooling system iS'Of a' conv'entional type which relieson the entryof water into the apertures l5 during operation of'theboat, and

' The invention contemplates to utilize'the flow of cooling medium througn'the cooling system just described, by inserting cat a point generally indicated rat l-8 in Fig; :1, :a nozzle and" Venturi tube system connectedito the bilge, as "more :iully '"apparentfrom Figs2; U

"As showninI-ig; '2,'thepipe l6, forming part of the pipe system indicated at 16" in Fig. 1, terminates iniainoz'zle 19. The toppart otfthe nozzle [9 is surrounded b'ythe 'lowerfiare'dror expanded portion 20 of a"=Venturi tube -which'also includes 'a' restricted" part '2! and an upper .flared "portioniZZ; The upper portion 22 iinturn leads to a pipe l6" which also forms-part ofzthe pipe system l6 shown in Fig.1. Thellowenflaredrpor- I tion520 iof theventuri tube' is sealedto' the walls of the nozzle It by a bottom closure 23 so as to create in this lower flared portion 20 and in the vicinity of the opening of nozzle [9, a suction chamber 24. This chamber 24 is connected, by a conduit generally indicated at 25, to the bilge of the boat. The conduit 25 which, for purposes later to be described, preferably is made flexible at least in part, is provided with a first filter indicated at 26 and located in proximity to the nozzle and Venturi system. As shown in Fig. 1, the conduit 25 also includes a manual control valve 21, a second filter 28 at or near the other terminal of the conduit, and a stand or support -with Figs. 1 and 2.

3 29, which is provided with apertures 30 for the purpose of permitting the bilge water to enter the conduit.

Referring now to Fig. 3, the device of the invention, indicated by the same reference numerals as in Figs. 1 and 2, is shown applied to an outboard motor of a diiferent type, wherein the cooling system includes a. pump and the positive action of the pump is relied upon to convey anddischarge the bilge water in addition to providing for a continuous flow of cooling medium. In Fig. 3, the lower unit 3| of an outboard motor comprises a water inlet 32 which leads to the rotary vane type of pump generally indicatedat 33 and comprising rotary vanes 34 mounted on a shaft 35 which, by a gear connection (not shown), is driven by the shaft 36 of the outboard motor. A casting 31 mounted on the lower unit and surrounding the shaft 36 incorporates a passage 38 for the cooling medium which connects with the discharage channel 3Bof the pump According to the invention, at a suitable point of the casting 31 there is inserted, in the cooling passage 38, the nozzle and Venturi tube system of Fig. 2, the parts of this system as well as the accessory structure leading to the bilge of the boat being precisely as described in connection In the operation of the boat bailing device according tothe invention, when the outboard motor is operating,-water is taken in through apertures 15 or water inlet 32, respectively, and passed through pipe system H5 or cooling passage 38, respectively, to the water jacket of the motor, to be discharged therefrom in a conventional manner. The passage of the cooling medium from-the nozzle [9 into the lower flared portion 20 of the Venturi tube, coupled with the flow of cooling medium through the restricted portion 28 and the upper flared portion 22 of the Venturi tube, combine to create a low pressure or partial vacuum condition in the chamber 24 surrounding'the opening of nozzle l9. In this manner, suiiicient suction is created at the end of conduit 25 to transport the bilge water [4 through apertures 30, filter 28, valve 21 and the other filter 26, into the'stream of cooling medium passing through the pipe system 16, with the result that as long as valve 21 is open, there is a continuous removal of water from the bilge. At times when no water remains in the bilge, the valve 21 is shut so as to prevent air from being fed into the stream of cooling medium passing 'to the stern of the boat. If desired, most of the conduit 25 may be provided rigid, only that 4 part being made flexible which if rigid, would interfere with the adjustability of the motor mount on the boat. The additional filter indicated at 26 is desirable for the reason that the filter 28 may be broken or damaged, in view of its more exposed location in the bottom of the boat, and to forestall any entry of undesirable material into the channels of the cooling system where it might lead to clogging. The filter 26 is located at a point where it can be easily cleaned or exchanged, and where it is not exposed to the danger of breakage or other damage. The valve 21 is located in close proximity to the operating levers of the outboard motor so as to be within easy reach of the operator at all times.

I wish it to be understood that I do not desire to be limited to the exact details of construction, design and operation shown and described as numerous modifications falling within the scope of the appended claims may be devised which would'entail no-sacrifice in the advantages of the invention, nor deviate from the essential concept thereof. I

I claim:

1. A boat bailing device for removing bilge water, particularly for boats propelled by an outboard motor having a forced water cooling system including a cooling water inlet pipe exterior to the motor and a cooling water outlet pipe, said device comprising a Venturi aggregate inserted in said inlet pipe, a water conduit connected to said aggregate and extending into the bilge of the boat, whereby the bilge water is caused to flow through said cooling system, and filters in said conduit for preventing foreign matter accumulated in the bilge from entering the cooling system.

2. A boat bailing device for removing bilge water particularly for boats propelled by an outboard motor having a forced Water cooling system including a cooling water inlet. pipe exterior to the motor and a cooling water outlet pipe, said device comprising a Venturi aggregate inserted in said inlet pipe, a water conduit flexible in part, connected to said aggregate and extending into the bilge of the boat, a valve, in -said conduit, whereby the bilge water may be drained and caused to flow through said cooling system, and filters in said conduit for preventing foreign matter accumulated in the bilge from entering the cooling system.

JACK FRYE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

